If you're a zombie fan, this is worth watching, but it's not one of those gems, like Undead or Dead Meat, that you could watch again and again. Ideal for a good one-night rental.
There are tons of really awful zombie flicks out there, with stupid dialogue, bad acting, and even worse makeup and F/X. Then there are the few really awesome offerings, that just hit on all cylinders, and keep you on the edge of your seat and begging for more. This movie is neither. It's truly not a bad movie, either in the general sense, or simply as a zombie flick. In fact, it's actually kinda fun. The worst thing going for it is simply that it's virtually impossible to come up with anything new, since it's all been done before, so you can't help but make comparisons. Had most of the events we see in this movie not been seen before in some guise, this would probably be considered a keeper. But, since we have seen it all before, it's important to ask yourself one, simple question: Did I enjoy myself while watching this. And the answer is yes.
It's true that there are slightly campy moments. It's true that there are back-to-back scenes where in one someone hears a distant moan, but in the next doesn't hear gunfire from the same location. It's true that some of the dialogue is cheesy, and you feel the pain of the seasoned pro doing his best to recite them without feeling silly. Nevertheless, if you just allow yourself to sit back and be drawn-in to the story, and can sustain a little suspension of disbelief without falling back on the tried-n-true (albeit fun) habit of nitpicking every little mistake and silly bit, I really think you'll enjoy yourself, and can kill and hour-and-a-half that you may never get back, but won't mind losing. :)